Nanomaterials by severe plastic deformation : proceedings of the conference "Nanomaterials by Severe Plastic Deformation, NANOSPD2," December 9-13, 2002, Vienna Austria

Nanomaterials by Severe Plastic Deformation......Page 4 Content......Page 10 I Reasons to Use Nanostructured Materials......Page 26 Unique Features and Properties of Nanostructured Materials......Page 28 Properties, Benefits and Application of Nanocrystalline Structres in Magetic Materials......Page 43 Formation of Nanostructures in Metals and Composites by Mechanical Means......Page 55 Scale Levels of Plastic Flow and Mechanical Properties of Nanostructured Materials......Page 62 Hydrogen-Induced Formation of Silver and Copper Nanoparticles in Soda-Lime Silicate Glasses......Page 69 II Large Strain Cold Working and Microstructure......Page 78 Equivalent Strains in Severe Plastic Deformation......Page 80 Stage IV: Microscopic Or Mesoscopic Effect ?......Page 90 Deformation Substructure and Mechanical Properties of BCC - Polycrystals......Page 97 Micro- and Nanostructures of Large Strain-SPD deformed L12 Intermetallics......Page 105 The Nature of the Stress-Strain Relationship in Aluminum and Copper over a Wide Range of Strain......Page 112 Strain Hardening by Formation of Nanoplatelets......Page 120 Modelling the Draw Hardening of a Nanolamellar Composite: A Multiscale Transition Method......Page 126 III Unique Features of SPD - Microstructure and Properties......Page 132 Paradoxes of Severe Plastic Deformation......Page 134 Investigation of Phase Transformations in Nanostructured Materials Produced by Severe Plastic Deformation......Page 143 Structure-Phase Transformations and Properties in Nanostructured Metastable Alloys Processed by Severe Plastic Deformation......Page 150 On the Influence of Temperature and Strain Rate on the Flow Stress of ECAP Nickel......Page 156 The Effect of Second-Phase Particles on the Severe Deformation of Aluminium Alloys during Equal Channel Angular Extrusion......Page 163 Effects of ECAP Processing on Mechanical and Aging Behaviour of an AA6082 Alloy......Page 170 Influence of the Thermal Anisotropy Internal Stresses on Low Temperature Mechanical Behavior of Polycrystalline and Nanostructured Ti......Page 176 Nano- and Submicrocrystalline Structure Formation During High Pressure Torsion of Al-Sc and Al-Mg-Sc Alloys......Page 183 Phase Transformation in Crystalline and Amorphous Rapidly Quenched Nd-Fe-B Alloys under SPD......Page 190 Structure and Functional Properties of Ti-Ni-Based Shape Memory Alloys Subjected to Severe Plastic Deformation......Page 195 Formation of Submicrocrystalline Structure in The Hard Magnetic Alloy Fe-15wt.%Co-25%Cr During Straining by Complex Loading......Page 202 Experimental Investigations of the Al-Mg-Si Alloy Subjected to Equal-Channel Angular Pressing......Page 208 Mechanical Properties of AZ91 Alloy after Equal Channel Angular Pressing......Page 215 Influence of Microstructural Heterogeneity on the Mechanical Properties of Nanocrystalline Materials Processed by Severe Plastic Deformation......Page 219 Creep Behaviour of Pure Aluminium Processed by Equal-Channel Angular Pressing......Page 225 Low Temperature Strain Rate Sensitivity of some Nanostructured Metals......Page 232 IV Modelling of SPD and Mechanical Properties of SPD Materials......Page 238 Importance of Disclinatioin in Severe Plastically Deformed Materials......Page 240 Disclination-Based Modelling of Grain Fragmentation during Cold Torsion and ECAP in Aluminium Polycrystals......Page 251 Modeling of Deformation Behavior and Texture Development in Aluminium under Equal Channel Angular Pressing......Page 258 Process Modeling of Equal Channel Angular Pressing......Page 264 Deformation Behaviour of ECAP Cu as described by a Dislocation-Based Model......Page 270 Severe Plastic Deformation by ECAP in an Acommercial Al-Mg-Mn-Alloy......Page 276 Evolution of Mechanical and Microstructural Properties of ECAP Deformed Copper......Page 282 A Composite Grain Model of Strengthening for SPD Produced UFG Materials......Page 288 Computer Simulation of Equal-Channel Angular Pressing of Tungsten by Means of the Finite Element Method......Page 296 V Texture Evolution and Simulation During SPD......Page 304 Texture Evolution in Severe Plastic Deformation by Equal Channel Angular Extrusion......Page 306 Textural Evolution during Equal Channel Angular Extrusion versus Planar Simple Shear......Page 322 Grain Refinement and Texture Formation during High-Strain Torsion of NiAl......Page 328 Severely Plastically Deformed Ti from the Standpoint of Texture Changes......Page 334 Development of Crystallographic Texture and Microstructure in Cu and Ti, Subjected to Equal-Channel Angular Pressing......Page 340 VI Details of SPD Nanostructures as Investigated by Electron Microscopy......Page 346 Boundary Characteristics in Heavily Deformed Metals......Page 348 Quantitative Microstructural Analysis of IF Steel Processed by Equal Channel Angular Extrusion......Page 357 HRTEM Investigations of Amorphous and Nanocrystalline NiTi Alloys Processed by HPT......Page 364 Effect of Grain Size on Microstructure Development during Deformation in Polycrystalline Iron......Page 370 Microstructure and Phase Transformations of HPT NiTi......Page 376 Types of Grains and Boundaries, Joint Disclinations and Dislocation Structures of SPD-produced UFG Materials......Page 382 Microstructure Development of Copper Single Crystal Deformed by Equal Channel Angular Pressing......Page 388 TEM Investigations of Ti Deformed by ECAP......Page 394 Microstructural Evolution during Severe Deformation in Austenitic Stainless Steel with Second Phase Particles......Page 400 Structural Models and Mechanisms for the Formation of High-Energy Nanostructures under Severe Plastic Deformation......Page 406 Grain Refinement and Microstructural Evolution in Nickel During High-Pressure Torsion......Page 412 VII Analyses of SPD Materials by Selected Physical Methods......Page 418 The Meaning of Size Obtained from Broadened X-ray Diffraction Peaks......Page 420 Ultra Fine Grained Copper Prepared by High Pressure Torsion: Spatial Distribution of Defects from Positron Annihilation Spectroscopy......Page 432 Anelastic Properties of Nanocrystalline Magnesium......Page 438 X-ray Peak Profile Analysis on the Microstructure of Al-5.9%Mg-0.3%Sc-0.18%Zr Alloy Deformed by High Pressure Torsion Straining......Page 445 Evolution of Microstructure during Thermal Treatment in SPD Titanium......Page 451 VIII Influence of Deformation Parameters to SPD Nanostructures......Page 458 The Role of Hydrostatic Pressure in Severe Plastic Deformation......Page 460 Influence of the Processing parameters at High Pressure Torsion......Page 472 Mechanical Properties and Thermal Stability of Nano-Structured Armco Iron Produced by High Pressure Torsion......Page 478 Properties of Aluminum Alloys Processed by Equal Channel Angular Pressing Using a 60 Degrees Die......Page 484 Deformation Behaviour of Copper Subjected to High Pressure Torsion......Page 490 Features of Equal Channel Angular Pressing of Hard-to-Deform Materials......Page 496 IX New Methods of SPD......Page 502 ARB (Accumulative Roll-Bonding) and other new Techniques to Produce Bulk Ultrafine Grained Materials......Page 504 Optimal SPD Processing of Plates by Constrained Groove Pressing (CGP)......Page 516 Comparative Study and Texture Modeling of Accumulative Roll Bonding (ARB) processed AA8079 and CP-Al......Page 523 Nanocrystallization in Carbon Steels by Various Severe Plastic Deformation Processes......Page 530 Severe Plastic Deformation by Twist Extrusion......Page 536 SPD Structures Associated With Shear Bands in Cold-Rolled Low SFE Metals......Page 542 Features of Mechanical Behaviour and Structure Evolution of Submicrocrystalline Titanium under Cold Deformation......Page 548 Ultra Grain Refinement of Fe-Based Alloys by Accumulated Roll Bonding......Page 555 X SPD with Ball Milling and Powder Consolidation......Page 562 Mechanically Activated Powder Metallurgy : A Suitable Way To Dense Nanostructured Materials......Page 564 Characterization and Mechanical Properties of Nanostructured Copper Obtained by Powder Metallurgy......Page 570 Densification of Magnesium Particles by ECAP with a Back-Pressure......Page 576 Annealed Microstructures in Mechanically Milled Fe-0.6%O Powders......Page 583 Processing and Characterization of Nanocrystalline Aluminum obtained by Hot Isostatic Pressing (HIP)......Page 589 Characteristics of Nano Grain Structure in SPD-PM Processed AISI304L Stainless Steel Powder......Page 596 Formation of Powder and Bulk Al-Cu-Fe Quasicrystals, and of Related Phases During Mechanical Alloying and Sintering......Page 604 Production and Consolidation of Nanocrystalline Fe Based Alloy Powders......Page 610 Strain Measurement in the ECAP Process......Page 616 XI Mechanical Properties and Thermostability of Nanocrystalline Structures......Page 622 Atomistic Modeling of Strength of Nanocrystalline Metals......Page 624 Multiscale Studies and Modeling of SPD Materials......Page 634 Microstructural Stability and Tensile Properties of Nanostructured Low Carbon Steels Processed by ECAP......Page 641 Microstructure and Mechanical Properties of Severely Deformed Al-3Mg and its Evolution during subsequent Annealing Treatment......Page 648 Dependence of Thermal Stability of Ultra Fine Grained Metals on Grain Size......Page 655 Thermomechanical Properties of Electrodeposited Ultra Fine Grained Cu-Foils for Printed Wiring Boards......Page 661 Effect of Grain Boundary Phase Transitions on the Superplasticity in the Al-Zn system......Page 667 Microstructure and Thermal Stability of Tungsten based Materials after Severe Plastic Deformation......Page 673 Development of Microstructure and Thermal Stability of Nano-structured Chromium Processed by Severe Plastic Deformation......Page 679 XII Influence of Deformation Path to Properties of SPD Materials......Page 686 Fatigue of Severely Deformed Metals......Page 688 Cyclic Deformation Behaviour and Possibilities for Enhancing the Fatigue Properties of Ultrafine-Grained Metals......Page 702 The Influence of Type and Path of Deformation on the Microstructural Evolution During Severe Plastic Deformation......Page 709 Formation of a Submicrocrystalline Structure in Titanium during Successive Uniaxial Compression in Three Orthogonal Directions......Page 716 XIII Features and Mechanisms of Superelasticity in SPD Materials......Page 724 Achieving a Superplastic Forming Capability through Severe Plastic Deformation......Page 726 Production of Superplastic Mg Alloys Using Severe Plastic Deformation......Page 736 High Strain Rate Superplasticity in an Micrometer-Grained Al-Li Alloy Produced by Equal-Channel Angular Extrusion......Page 742 Diffusion-Controlled Processes and Plasticity of Submicrocrystalline Materials......Page 747 Superplastic Behavior of Deformation Processed Cu-Ag Nanocomposites......Page 753 Features of Microstructure and Phase State in an Al-Li Alloy after ECA Pressing and High Strain Rate Superplastic Flow......Page 759 Microstructure Refinement and Improvement of Mechanical Properties of a Magnesium Alloy by Severe Plastic Deformation......Page 765 Grain Refinement and Superplastic Properties of Cu-Zn Alloys Processed by Equal-Channel Angular Pressing......Page 771 XIV Mechanisms of Diffusion Related Processes in Nanocrystalline Materials......Page 778 Diffusion in Nanocrystalline Metals and Alloys – A Status Report......Page 780 Self-Diffusion of (147)Nd in Nanocrystalline Nd(2)Fe(14)B......Page 792 Theoretical Investigation of Nonequilibrium Grain Boundary Diffusion Properties......Page 798 On Annealing Mechanisms Operating in Ultra Fine Grained Alloys......Page 805 XV Application of SPD Materials......Page 812 Commercialization of Nanostructured Metals Produced by Severe Plastic Deformation Processing......Page 814 The Main Directions in Applied Research and Developments of SPD Nanomaterials in Russia......Page 823 Developing of Structure and Properties in Low-Carbon Steels During Warm and Hot Equal Channel Angular Pressing......Page 829 Mechanical Properties of Severely Plastically Deformed Titanium......Page 835 Ways to Improve Strength of Titanium Alloys by Means of Severe Plastic Deformation......Page 842 Structures, Properties, and Application of Nanostructured Shape Memory TiNi-based Alloys......Page 847 Microstructure and Properties of a Low Carbon Steel after Equal Channel Angular Pressing......Page 854 Formation of Submicrocrystalline Structure in Large-Scale Ti-6Al-4V Billets during Warm Severe Plastic Deformation......Page 860 Author Index......Page 866 Subject Index......Page 870

nanotechnology Has Spawned The Creation Of Many Novel Fabrication Processes Enroute To A Nanomaterial, Nanophase, Or Nanomachine. Severe Plastic Deformation (equal Channel Angular Pressing – Ecap, High Pressure Torsion – Hpt, Accumulated Roll Bonding – Arb, Etc.), A Highly Refined Derivative Of Deformation Processing, Is Beginning To See Wide Use For Obtaining A Nanophase Microstructure In Crystalline Solids. It Has Led To The Improved Strength Of Metals And Alloys Without Loss In Workability, And To Markedly Enhanced Superplasticity And Fatigue Properties. Advantages Of Severe Plastic Dformation Include The Production Of Large Specimens And The Achievement Of Nanophase Materials Without Porosity.

these Proceedings Of The “second International Conference On Nanomaterials By Severe Plastic Deformation” Review The Enormous Scientific Avalanche Which Has Been Developing In The Field During The Recent Years. It Is A Valuable Resource For Any Scientist And Engineer Working In This Emerging Field Of Nanotechnology.